MAX5388MAUB+T

Overview

The MAX5388MAUB+T is a dual, volatile, low-voltage linear taper digital potentiometer manufactured by Analog Devices Inc./Maxim Integrated. It features two independent 256-tap potentiometers in a 10-pin µMAX package. One channel operates as a voltage divider, while the other functions as a variable resistor. The device supports end-to-end resistance values of 10kΩ, 50kΩ, and 100kΩ, with the 'M' suffix indicating the 50kΩ variant. It operates from a single +2.6V to +5.5V supply, draws less than 1µA quiescent current, and includes an SPI-compatible interface for wiper control.

Feature Summary

• Dual 256-tap linear taper configuration with one voltage-divider and one variable-resistor channel
• SPI-compatible 3-wire serial interface (CS, DIN, SCLK)
• Low supply voltage operation (+2.6V to +5.5V) with <1µA standby current
• Power-on reset sets both wipers to midscale position

Applications

• Portable electronics and battery-powered devices
• Mechanical potentiometer replacement
• Offset and gain control in signal conditioning circuits
• Adjustable voltage references and linear regulators

Procurement Notes

Verify the component status before procurement planning. The provided source material indicates that the related MAX5388NAUB+T part number has been discontinued by DigiKey. Confirm current availability and lifecycle status directly with the manufacturer or authorized distributors, as specific stock levels are not included in this technical documentation.

Selection Notes

Select the MAX5388MAUB+T when a 50kΩ end-to-end resistance is required. The 'M' designation specifically identifies the 50kΩ version within the MAX5388 family; choose 'L' for 10kΩ or 'N' for 100kΩ if different resistance values are needed. Ensure the application utilizes a volatile memory architecture, as power loss resets the wiper positions to midscale upon re-powering.

Part Context

This component belongs to the MAX5386/MAX5388 family of dual digital potentiometers. While the MAX5386 provides two voltage-divider channels, the MAX5388 offers mixed functionality with one voltage-divider and one variable-resistor channel. Both families share identical electrical characteristics and packaging options, differing primarily in internal channel configuration.

Replacement Considerations

Direct functional replacements within the same package include the MAX5388LAUB+T (10kΩ) and MAX5388NAUB+T (100kΩ). These parts maintain the same pinout and SPI interface but differ in end-to-end resistance values.